add media module + imagesharp integration

zero/Media/MediaFileSystem.cs

@@ -0,0 +1,39 @@
+namespace zero.Media;
+
+public class MediaFileSystem : PhysicalFileSystem, IMediaFileSystem
+{
+  protected string PublicPathPrefix { get; }
+
+
+  public MediaFileSystem(string root, string publicPathPrefix) : base(root)
+  {
+    PublicPathPrefix = (publicPathPrefix ?? String.Empty).EnsureEndsWith('/');
+  }
+
+
+  /// <inheritdoc />
+  public override string MapToPublicPath(string path)
+  {
+    if (path.IsNullOrEmpty())
+    {
+      return null;
+    }
+    return PublicPathPrefix + path.TrimStart('/');
+  }
+
+
+  /// <inheritdoc />
+  public bool IsMediaPath(string path)
+  {
+    return path.StartsWith(PublicPathPrefix, StringComparison.InvariantCultureIgnoreCase);
+  }
+}
+
+
+public interface IMediaFileSystem : IFileSystem
+{
+  /// <summary>
+  /// Determine whether the given path is part of the media file system
+  /// </summary>
+  bool IsMediaPath(string path);
+}